Bubble Cpap Circuit

Bubble CPAP Circuit
A Bubble CPAP circuit is designed to provide continuous positive airway pressure (CPAP) to newborns with respiratory distress. The circuit consists of several key components:

Pressure Generator: Pressure is created by placing the distal end of the expiratory tubing in water. The depth of the tubing submerged determines the pressure generated in the airways of the infant. As the gas flows through the system, it "bubbles out, preventing excess pressure buildup.

Patient Interface: Short and wide nasal prongs are used as the nasal interface between the circuit and the infant s airway. These prongs allow for low resistance to airflow and are essential for preventing nasal trauma while ensuring a secure fit.

Humidifier: Filters the gas source, providing warmth and humidity to the gas mixture. It also provides access to the oxygen analyzer to monitor the fraction of inspired oxygen (FiO2).

Blender: Controls the FiO2 and flow rate of the gas mixture delivered to the infant. Adjusting the flow meter between 5-7 liters per minute and the FiO2 to maintain saturation between 87-93% or as per medical instructions is crucial.

Bubble Bottle or Bubbler: This component is where the expiratory tubing end is submerged under water to create the desired pressure within the CPAP circuit. The depth of the tubing submerged determines the pressure generated.

Capillary Tube: Connected to the bubble bottle, it helps in maintaining the pressure by creating bubbles as the gas flows through the system.

The Bubble CPAP system is known for its simplicity and low cost, making it particularly useful in resource-limited settings. It is associated with a decreased incidence of bronchopulmonary dysplasia (BPD) compared to mechanical ventilation